Tungsten carbide electrode is the use of carbon steel welding core of low hydrogen sodium type coating surfacing electrode. Rely on the skin in the tungsten carbide alloy transition, surfacing metal tungsten content of 40% to 50%. As the drug skin is thick, so the sleeve is longer, the electrode is prone to small pieces of peeling off after the electrode is red, it is appropriate to use DC current, the electrode connected to the positive, the use of smaller current.